Device for use in zeroing dummy rifles and other dummy firearms used for training marksmen



y 1945. 2. DE LUBlCZ-BAKANOWSKI ET AL 2,380,

DEVICE FOR USE IN ZEROING DUMMY RIFLES AND OTHER DUMMY FIREARMS USED FOR TRAINING MARKSMEN I Filed June 11, 1945 Patented July 10, 1945 i DEVICE. FOR

USE IN- ZEROING DUMMY RIFLES AND OTHER DUMMY FIREARMS USED FOR TRAINING MARKSM'EN Zygmunt de Lubicz-Bakanowski and Frederick John Minns, Oxford, England, assignors to The Swift Rifle Company Limited, Oxford, England Application June 11, 1943, Serial No. 490,502 In Great Britain April 18,1942

-- 1 Claim. 273-1012) This invention relates to an improved sight zeroing or testing frame for dummy rifles and other weapons used for training purposes, such as semi-automatic rifles and machine guns;

In one form of training rifle or other fire-arm used for training purposes the dummy weapon is used in associationwith a target support placed 1 in close proximity to its front end and intended tov be pierced with a round hole and a slit by a rod projected by a firing mechanism andprovided with two piercing pins 'of appropriate shape.

The precision of such dummy. rifles and other fire-farms used for training purposes may be impaired by damp, rust, careless use or accident and the object of the present invention is to provide means which will enable the precision to be readily tested and quick and correct adjustment to be effected should it be found necessary to do so.

The invention consistsin the provision of a sight zeroing or testing frame adapted to be readily fitted to the front end of the training rifle or the like, said frame having a strip of paper attached tightly across it, such as by gluing, by. means of clips or otherwise.

Since the frame is required only for the purpose of testing the precision and for adjustment, if necessary,

being understood, however, that, alternatively, itv

may be so mounted on the front end of the weapon that it can easily be moved out of the path of the piercing rod after testing and adjustment, so that the Weapon may then be used for training with the target associatedtherewith. v

In order that'the zeroing frame maybe repeatedly used with one and the same strip of paper, it preferably comprises a block adapted to be fitted to and conform to the shape of the lower part of the front. end of the particular training weapon and a U-shaped frame pivotally or slidingingly mounted on the block, the frame having the strip of paper tightly attachedacross it. By pivoting or sliding the frame relatively to the said block, a fresh part of the'paper can be I brought in front of the piercing pins. The block is preferably provided with an open slot to enable the frame as a whole to be readily slid over a grub screw which is attached tothe front end of the gun and by means of which the deviceis fixed in position.

i The fore end of the weapon is provided on both sides with pairs of grub screws used to adjust the alignment laterally,

it is made readily detachable, it I if after firing for the frame at on the testing purposes it is fore-sight is not exactly in the center of the the piercing pins and found that the tip of the round hole made by one of a later-al adjustment of the channel in which the projecting rod carrying the piercing pins moves is'required. By means of a screw prothe necessary correction may be effected by hand,

by gently adjusting one of the piercing pins up or down as required, preferably the pin which pierces the hole in the form of a slit.

The sight testing frame is preferably made of wood, it being understood that-it may also'be made of any other suitable material.

Referring to the accompanying drawing illustrating, by way of example, one form of zeroing frame tobe provided on a dummy rifle, according to the present invention,

Figure 1 is a front elevation, Figure 2 a plan ofgthe frame and Figure 3 a perspective view of the frame shown applied to the front end of a of the dummy rifle R, and with of which the block can of the front end an open slot 0, by means be slid over a grub screw S attached to the front end of the rifle, the grub screw securing it in the required adjusted position. d. is a U-shaped frame which is pivoted to the block at e and across which the strip of paper shown by the.

is tightly attached. By pivoting block a, as indicated in chaindotted-lines in Figure 1, afresh part of the paper can be brought in front of the piercing pins t of the dummy rifle after each test as apparent from Figure 3.

We claim:

A sight zeroing or testing device for dummy rifles and like weapons comprising a block fitting on to the lower part of the front end of the rifle and having an open slot engageable with a grub screw attached to the front end of the rifle and by means of which it can be secured in the required adjusted" position, a U-shaped frame pivoted to the'block, and a strip of paper'attached dotted lines I,

tightly across said frame.

vided underneath'the fore and the alignment'can I be adjusted in a vertical direction should it be 

